Hydroplane-boat.



' I. CHASE. HYDROPLANE BOAT.

APPLICATION FILED JUNE 14, 1911. 1,050,531 7.

VI u l,",":"' 1 1 l ll l l lf ATTORNEYS Patented Jan. 14,1913.

I. CHASE. HYDROPLANE BOAT.

WITNESSES: INVENTOR W ,Z 6% 2!! v BY ATTORNEYS IIIIIIIIIIIIIIIIIIIIIIIIII 1. v

Patented Jan. 14, 1913. 4 EEEEEEEEEEEE 2.

I. CHASE. HYDROPLANE BOAT. APPLICATION FILED JUNE 14 Patented Jan. 14,1913.

4 SHEETS-SHEET 3.

IN VENTOR ATTORNEYS I. CHASE.

HYDROPLANE BOAT.

APPLICATION FILED JUNE-111;, 1911. 1,050,5 1 '7.

4 SHEETSSHEET 4.

Fly 3? WITNESSES: INVENTOR Q D511 I BY Q R MJZ ATTORNEYS Patented J an. 14, 1913.

* UNITED STATES PATENT ()FFICE.

IRWIN CHASE, OF BAYQN NE, NEW JEESEY, ASSIGNOR T ELECTRIC LAUNCH COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

HY DROPLANE-B OAT.

. a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention contemplates the coadaptat-ion of a buoyant hull and hydroplane membars of novel configuration, secured thereto and designed to assume increments .of the weight of the hull as the speed is increased and eventually to support the entire hull above the surface of the water, wholly relieving it of its buoyant function when high speed is attained. The state of repose, the

interval of acceleration from repose to high speed, and the period of continuance of high speed, constitute three phases which will be considered in connect-ion with the hydroplane boats forming the subject matter of this application. The state ofrepose requires merely a suitable and sufficient displacement of the water by the buoyant hull to support the hull and itsappointments in a stable manner. The interval of acceleration to high speed demands that every means of lessening the resistance to the forward motion of the boat be employed. The hull should be designed to minimize the resistance to forward movement at all times during its varying displacement and disturbance of the water and to withstand the strains incident to the substitution of the support of the hydroplane members for its buoyant support on the water, while the hydroplane members should be designed to take up the necessary support of the hull,

afford the least possible resistance to the water and maintain stability and control of direction. During the period of continuance of high speed the hull is entirely above the surface of the water, being supported solely upon the hydroplane members, and an unbroken hull structure fromstem to stern is desirable to withstand the severe strain to which itis siibjected when rough water is encountered. The characteristics then most desired in the hydroplane members are the Specification of Letters Patent.

Application filed June 14, 1911.

Patented Jan. 14, 1913.

Serial No. 633,102.

capacity to maintain the stability and direct1on of the craft, a form which will efiect the least possible disturbance of the water over which they travel and ofier the least possible resistance to forward movement.

\Vith the object in view of producing a boat capable of high speed I have realized the several features of configuration and structure which are hereinafter described in detail and embodied and combined in the boat illustrated in the accompanying drawings.

In the drawingsFigure 1 represents a side elevation of a preferred embodiment of my invention in a high speed hydroplane boat. Fig. 2 is an inverted plan showing the bottom surfaces of the hydroplanes. Fig. 3 is a bow elevation. Fig. 4 is a section on line 4-4 of Fig. 1. Fig. 5 is a section on line 5-5 of Fig. 1. Fig. 6 is a section on .line 6-6 of Fig. 1. Figs. 7 to 10 represent inverted plans of modified forms of hydroplanes. Figs. 11 to 17 represent midship cross-sections of variously modified embodimentsof this invention; and Figs. 18 to 27 represent cross-sections of various forms of corrugate 'hydroplanes showing profiles of their corrugate surfaces.

Referring to the drawings like reference characters indicating like parts throughout the several views, I prefer that the buoyant hull indicated by the letter A should substantially conform to the box type shown and should have an unbroken bottom line from stem to stern to admit of the strongest fore and aft construction inwhich the keel and strakes may be continuous. -The chines a at the junction of the comparatively flat bottom and the sides of the buoyant hull A are carried up to meet the deck'line at the point a some little distance aft of the outwater so as to make the whole bow and entrance one continuous surface with the bottom strakes, and in such manner that the breasts formed just forward and inboard from the chine shall at a point slightly above the water surface when the boat is planing make a large and effective angle, (preferably of about 45) with the horizontal. The water-lines at this point are slightly hollow and run forward to the outwater with gradually decreasing curvature.

The surfaces ust forward of the chine are thus admirably adapted to lift the bow without shoclr when the boat encounters a trans verse wave. So also when hydroplane boat is running in a quartering sea, there is a serious tendency to pitch heavily ,toice ward just as it clears the crest of a wave; the boat dropyciing by the head. and listing so as to partially submerge one side. ith chino and bow built as described there is a powerful righting force exerted under these conditions. The gradual angle at which the surface encounters the water produces great pressure without shock and effec surface being approximately the maxinnun bearn of the boat, the longest righting arm. available used.

The bottom proper of the should have an unbroken smooth under surface from stem to stern this surface should coi orin to the eneral plan of the required angenientof the series of hydroplane ineinbcrs B which to be attached.

retofore in hydroplane lave arisen when the bo e hydroplanes, as a tendency ed due the absence sufncient xl resistance offered by the smooth. plane sui abnormally large rudders but always th sacrifice of speed by the addition of resistance to the water,

It have increased the stability and direction maintaining character or coats of this class and the lifting" power of the planes by proriding the hydroplane ineinbers with corru; ate under surfaces, th corrugations E) running in a general way lengthwise. of the boat but it is advisable under certain circumstances to so place he corrugations that they will practically follow the normal stream lines and in some cases so that they will inthience the passage of 'ie surface water under the boat they ricer not be exparat st to the center .line of the boat,

it desi to carry out 0 st. e wherever the water at any time e boat and may on these sun buoyant hull Locust? the line 6 where the hydroplanes first touch the water is sinuous, wavy or serrate when corrugations are used (see shaded parts representing wetted surface in Fi 2) and this formation enters the water with greater ease and with less disturbance of the sur-- face of the water at this point and consequently with less resistance than the unbrolren line of initial contact of or fair surface.

The corrugate under surfaces of the hydroplanes offer great lateral resistance hold ing the craft to its true course and causing the surface water to pass straight under the boat with little lateral deflection which is the ideal condition sought since it has the effect of increasing both the lifting power of the planes and the direction-maintaining characteristics of the boat. Such variations from the straight fore aft as may be given the corrugations will always tend toward a more perfect result and will be directed to confining in the most advantageous manner the stream lines of the water necesleave water with little re istance wake,

the pockets formed between the several h droplanes when running it do not ll "tten the forward edges of corrugated sleet hydro planes where they meet the under surfaces the buoyant hull but leave the interstices 9" (see 18) formed by the cross-section of ions open. These interstices serve to permit air from under one hydroplajie to pass under the next and to some extent when the boat-is reversed, to allow the water pocketed under the hydroplanes to escape. i

In Figs. 1a 15 l have shown droplanes carried up at the sides to a point above the load water line providing a space between the sides of the hydroplanes and the sides of the buoyant hull through which space air can reach the pockets under the the hyplanes and stream under the boat when run-, a

hen corrue te sheet 'droolanes are A Q employed the corrugations give longil stren 1t. and transverse bridges 72,

m i 11 'Ol.

"eously used. and

.led

y c i. being shown in i .eferred form showing may a i re :7 e passageoi an l lll a number of applications of my corrugated hydroplanes to continuous bottom hulls, the preferred forms of which, however are those illustrated in Figs. 11 and 17 in which the profile of the bottom ofthe boat is made" to correspond or in other words to be substantially parallel with the profile of the hydroplanes. This preferred arrangement is of course embodied in the preferred form of boat illustrated in Figs. 1 to 6. The profiles of corrugated members shown in Figs. 18 to 27 illustrate some of the many forms of cor- .rugated surfaces which can be advantageously used and in those figures they are shown as corrugated sheet material. These same corru ated surfaces may be produced upon one s1de of thicker material if sheet material is not desired.

Figs. 13 to 27 illustrate the corrugated members with their mean surfaces plane but of course they may be inclined upwardly or downwardly from i the keel as planes or curved surfaces as the particular design to which they are applied may call for.

While it is preferred to apply the *cor rugate water contacting surfaces to hydroplanes which are not surfaces of the buoyant hull itself, nevertheless I do not wish 10 confine their use to such hydroplanes but desire to protect their use directly upon the surface of the buoyant hull as well.

Having thus described my what I claim is:

1. A boat provided with a surface skiinming hydroplane having a keelwise cor rugated under surface devoid of transverse obstructions.

2. A boat provided with a stepped series of surface skimming hydroplanes having keelwise corru ated under surfaces devoid of transverse o structions.

3. A boat comprising a buoyant hull naving an unbroken bottom slfrface and a'surface skimming hydroplane, secured to said bottom surface said hydroplane having keelwise corrugated under surface devoid of transverse obstructions.

4. A speed boat, the forebody of which has water lines making. a fine entrance and extending with increasing outward curvature into a chine which intersects the deck line at a region of wide beam well aft of the,

formed above the running load water line' -just inboard and forward of the chine making large and effective angles with the water lines. I

7. A hydroplane boat comprising a buoyant hull of box type having an unbroken bottom surface with chines intersecting the deck line aft of the cutwater and a stepped series of hydroplanes secured to said bottom surface and provided with corrugations in their water contacting surfaces taking a general fore and aft direction.

8. A hydroplane boat comprising a buoyant hull having a continuous bottom and a stepped series of surface skimming hydroplane members securedto said bottom, said hydroplanes having substantially fore and aft directed corrugations in their water contacting surfaces, and said bottom being invention substantially conformed in cross section to the desired cross-section of said members' 9. The combination with a buoyant hull surface skimming corrugated sheet hydroplane members secured thereto, the under surfaces of said hydroplane members being devoid of transverse obstructions.

10. The combination with a buoyant hull of corrugated sheet metal hydroplane members secured to said hull with their corrugations running generally fore and aft, the under surfaces of said hydroplane members being devoid of transverse obstructions.

11. The combination with a buoyant hull having a continuous bottom of corrugated sheet metal hydroplane members having their forward ends secured directly to said bottom and their rearward ends spaced from said bottom by transverse bridges, the under surfaces of said hydroplane members being devoid of transverse obstructions.

12. The combination with a buoyant hull of corrugated hydroplane members attached at their forward ends to said hull and spaced therefrom at their rearward-ends by bridges, the space between the hydroplane members and the hull being open forward and aft to permit flow of water longitudinally between the hull and the hydroplane.

13. In a hydroplane boat, the combination with a buoyant hull of a stepped series of corrugated sheet metal hydroplane members attached at their forward edges to said hull and spaced from said hull at their m Wi wam? remward' scigges, the corrugations of said Kntestimo-ny whereof affiK-my signature members "taking a, gaienemliy fore and aft in presence 0i two "Witnssses.

direction and )rovi in interstices at me w "g1 n point of attachinent of i hs forward edge of FEW m1 CPMLSM' said mambers to the hull through which Wi'messesz air may pass to tbs space beneath said mem- WILLIAM DAVIS, bars. MARCUS G. HOPKKNS, 

